Chair base



1. Chair base

1.1 : Perspective

1.2 : Perspective

1.3 : Front

1.4 : Back

1.5 : Left

1.6 : Right

1.7 : Top

1.8 : Bottom

1.9 : Enlarged

1.10 : Folded state reference

1.11 : Folded state reference

The parts shown by means of broken lines in the reproductions are not part of the claimed design; fig. 1.9 is an enlarged view of a portion labeled “9” in fig. 1.1 ; the dash-dot-dash lines in fig. 1.1 and fig. 1.9 , and the label “9” in fig. 1.1 are for the purpose of depicting the cut line of the enlarged view and form no part of the claimed design. 

CLAIM The ornamental design for a chair base, as shown and described. 